Rio Tinto’s Iron Ore Company of Canada (IOC) will supply pellets, per RIO's August 9 press release.

"IOC’s direct reduction pellets will account for a significant part of the iron ore supply to H2 Green Steel’s flagship plant in Boden, Sweden, which will be one of the world’s first large-scale producers of low carbon iron and steel."

source: https://www.riotinto.com/en/news/releases/2023/rio-tinto-and-h2-green-steel-partner-to-accelerate-the-green-steel-transition#

And VALE, too:

"In a multi-year agreement, Vale will supply H2 Green Steel with iron ore pellets as input material for its steel mill in Boden. Vale is a Brazilian mining company and the world’s largest supplier of direct reduction pellets."

source: https://www.h2greensteel.com/latestnews/h2-green-steel-and-vale-in-agreement-for-the-supply-of-direct-reduction-iron-ore-pelletsnbspnbsp